Oocystaenium Gonzalves & Mehra, 1959

Holotype species: Oocystaenium elegans Gonzalves & K.R.Mehra

Original publication and holotype designation: Gonzalves. E.A. & Mehra, K.R. (1959). Oocystotaenium, a new genus of the Chlorococcales. Hydrobiologia 13(1-2): 201-206.

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Description: Solitary, fusiform cells, 37-64 x 150-216 m, not embedded in mucilaginous matrix. Cell walls smooth. Cells with single central nucleus; parietal chloroplasts numerous and discoid to lanceolate, each with single pyrenoid. Asexual reproduction by autospores, 2-4 per sporangium and released by rupture of parental cell wall. Sexual reproduction homothallic and oogamous. Eggs spherical, to 100 µmdiameter, produced singly in oogonium; during maturation rupturing oogonial wall. Spermatia biflagellate with pointed apex; 16 or 32 sperm per antheridium. Gametangial production induced by transfer to fresh medium with high light conditions. Zygote spherical with thick cell wall; in old cultures becoming brick red.

Information contributed by: D.J. Garbary & M.D. Guiry. The most recent alteration to this page was made on 2023-06-14 by M.D. Guiry.

Taxonomic status: This name is of an entity that is currently accepted taxonomically.

Gender: This genus name is currently treated as neuter.

Most recent taxonomic treatment adopted: Komárek, J. & Fott, B. (1983). Chlorophyceae (Grünalgen) Ordnung: Chlorococcales. Das Phytoplankton des Süsswassers. In: Das Phytoplankton des Süsswassers (Die Binnengewässer) XVI. 7. Teil 1. Hälfte. (Huber-Pestalozzi, G. Eds), pp. [1]-x, [1]-1044. Stuttgart: E. Schweizerbart'sche Verlangbuchhandlung (Nägele u. Obermiller).

Comments: Oocystaenium is known from soil or planktonic in freshwater puddle; reported only from India and Cuba.

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Contributors
Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in CD format. These AlgaeBase descriptions are now being continually updated, and each current contributor is identified above. The PSA and AlgaeBase warmly acknowledge the generosity of all past and present contributors and particularly the work of Dr Parker.

Descriptions of chrysophyte genera were subsequently published in J. Kristiansen & H.R. Preisig (eds.). 2001. Encyclopedia of Chrysophyte Genera. Bibliotheca Phycologica 110: 1-260.

Linking to this page: https://www.algaebase.org/search/genus/detail/?genus_id=47449

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 14 June 2023. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 01 May 2024